Mass spectrum of spin-one hadrons in dense two-color QCD: Novel predictions by extended linear sigma model
28 December 2023
High Energy Physics - Phenomenology
Construct extended linear sigma model for spin-0 and spin-1 hadrons respecting approximate SU(4) symmetry
Examine spin-1 hadron mass spectrum at finite density within mean-field analysis
Find vector meson/diquark mean fields crucial to match lattice onset condition and pion mass
Reproduce slight rho mass reduction via mixing effects
Demonstrate possible axialvector and vector condensed phases
Mass spectrum of spin-one hadrons in dense two-color quantum chromodynamics
This paper constructs an extended linear sigma model to describe both spin-0 and spin-1 hadrons in two-color quantum chromodynamics (QCD) while respecting approximate Pauli-Gürsey SU(4) symmetry. A mean-field analysis examines the spin-1 hadron mass spectrum at finite quark chemical potential and zero temperature. Incorporating vector meson and vector diquark baryon mean fields in addition to scalar counterparts is key to reproducing lattice results for the onset baryon superfluidity condition and pion mass dependence. Mixing effects also explain the slight rho meson mass reduction, and predict possible axialvector and vector condensed phases.
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